Questions again... I have chance to buy this lens new for about 2/3 of its usual shop price (in EU) and I am sure somebody here mentioned he uses it. I would like to know how it performs. My wife loves macro shooting and recently we only have Vivitar macro TC + 50/1.7, so this Sigma could be nice upgrade. I would like to have AF prime lens at about 100mm and was thinking about Tamron 90 macro. Which one is better for macro or portraits? Is this Sigma compatible with *ist D? How fast is its AF? Thanks for any feedback...
Peter Belak
